PUR is the same as ordinary thermoplastic hot melt adhesives. The adhesive is heated and melted, and after being applied to the substrate, it cools and condenses to produce the initial bond strength; in the moisture curing stage, the -NCO in PUR is mainly related to the air The chain extension reaction occurs from the moisture, so that it has high bonding strength, good chemical resistance, heat resistance, hydrolysis resistance, and can be glued to many types, and is compatible with treated surfaces such as painted surfaces.
Good performance. Generally, Increasing the humidity during curing is conducive to full reaction and promotes the progress of moisture curing, thereby shortening the curing time and improving the bonding strength.
